LUVTruck.com

http://cgi.ebay.com/ebaymotors/GODSPEED ... ccessories

no idea if it is even worth buying or if i should just find a used garrett and rebuild it.

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

the problem with ebay turbos is that they are exactly that.. ebay turbos. They are HIT AND MISS.... sometimes you win... most of the time you loose.

I have used these myself to great sucess but I also own a turbo rebuilding shop.

These turbos are chinese manufactured knock-offs of genuine american hardware. while there isnt anything bad with that, there are some things that are critical to a turbos design that effect its overall performance.

Example 1. compare a chinese GT-25 to an American Turbonetics GT-25. you will notice a major difference in the compressor and turbine wheels immediately... as the wheel sizes are slightly smaller and not exactly like the original, the casting itself is not nearly as clear - and there are large balancing mill reliefs machined into them.
these are obvious signs of inferior cast wheel design. poor quality alloys, poor castings, and generic balancing jobs. the major issue here is that turbos are very clearance critical units, the sloppier the internal clearances the lower adiabatic efficiency of the turbo. This is important for proper turbo choice. as a poor running unit will only overheat your incoming charge to excessive levels. as a shop proprietor, I reccomend a minmum 62% adibatic efficiency

Example 2. The Cartridge. Again, compare the bearings and the journals of an american unit and a chinese unit.
Excess slop and overly machined journal locators, improperly milled thrust surfaces and just large amounts of general manufacturing debris. You have to remember the Turbo lives on the same oil as your engine, if the unit is full of junk then chances are good soon your engine will be too. A note on bearings and clearances, not only does this unit share life oil with the engine, but it supplys air as well! if your thrust or main clearances "wobble out" as we call it, where good bearings shake under load due to poor housing machine work, the compressor will contact the housing. spraying a nice fine powder of aluminum for the engine to breathe, or better yet... shatter the wheel and take the engine with it.

those are the major things to watch... other than that, there decent stuff... there about 25 to 30 hp lower than the comparable american unit but for like 1/8th of the cost. rebuilds can be hit or miss as well, 75% of most shops wont service these units - as internals are specific to the chinese units. and rebuilds often only provide sub standard internal replacements which fail for the same original reason anyways!these units have actually been a boon for us at our shop, by allowing us to offer cheap(er) racing units.. converting the chinese units to accept american internals and pass our balancing stds. as for rebuilding a used garret.... whats your turbo experiance?

It all comes down to you really.... are you ballsy enough to risk you hard worked G180 on a lousy turbo?

REMEMBER

pays with peanuts, gets you peanuts.

A.j.

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http://www.youtube.com/watch?v=ykgDNjeTa0g

lol very true
that was my concern
obviously the american made turbonetics garrett etc are $1000+ a piece because they are made to do what they were made to do all day long without having issues as long as you keep with the upkeep, and are worth the money you put into them for the power and reliability you get out of them.

by rebuild i meant having a used garrett gt25 professionally rebuilt instead of buying the "rebuilt t25" off of ebay, or trying to get it right with a kit myself. i dont trust that as far as a three year old can throw it.

i have no turbo experience which is why i asked before i decided to go buy something. i know the american turbo's are much higher quality in workmanship and materials and will pay off ten fold in the long run in headaches and replaced parts combined.

i have been doing research on efficient turbo setups, common causes for failures, etc. i also talked to darren Gemracing about boosting a G180 and the feedback form him was a STOCK g180 stock headgasket, internals etc can run 15psi boost... i dont want that much but knowing it is possible is helpful. im thinking about 10 at max. 8-10, intercooled, internal wastegate with a split downpipe for the wastegate, yards and yards of heat wrapping...
i jus twant the LUV to have the power it looks like it should have while still running reliably

i was kicking around the idea of adding a oil cooler before the turbo with a fan to lower the incoming oil temp a bit and make cooling a bit more efficent (if oil & water cooled doing the same for the coolant) like i said im in no way an expert (but thankfully able to ask for help before going out and grenading my new motor) but i have a lot of ideas in my mind to make the setup as reliable as possible while doing keeping wear and heat down as much as possible.

how much does a properly rebuilt gt25 cost?

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

+1

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'75 body with '82 diesel running gear
My build thread.

well depending on weather the compressor and turbine wheels can pass NDI and worse case needs a rebalancing your looking at about 325 to 525 for a professional shop to rebuild it, less if its a really solid unit.

as for the G180... I still personally dont think its a good idea... there just isnt enough support on the american side to make it a viable option. Sounds like a recipe for headaches.

as for the oil cooler, one added to the engine is fine, but do not place one inline with the turbo. even the best oil cooler on the market causes pressure drop, and even the slightest bit is enough to crunch a bearing. A intercooler is more appropriatly what you need for the control of the discharge temps. but again, something that should be engineered to fit your application though a junk yard unit may get the job done.

im not sure what you mean by split down pipe, if its internal wastegate there is no need for external piping. for the size of turbo and the boost your suggesting, stay away from external wastegates. just more headaches.

as for picking the turbo, how did you come to the conclusion of a GT25? and why such a modern unit? I bet an older journal bearing T3/t4 hybrid would be cheaper and just as efficient. I would suggest a TA-49 or a 5857 precision.

Look at your total combined head flow, in relation to determined power goals and rotating assembly stress point. choose at which rpm you want to produce peak power. from there look at your compressor map and compare your pressure ratios to the fuel weight needed at that particular flow rate for your head. that tells you where in islands you are. several things should be taken in for account before commiting to the turbo itself.

were you going auto trans or stick?

A.j.

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http://www.youtube.com/watch?v=ykgDNjeTa0g

What about a TD04 turbo. It is a stock Subaru WRX turbo that is small and should be able to give you more than enough boost and quick too. You are in the NW and can find these on Craigslist all day from $40-$200. I sold my old turbo for $140 and it had 15k on it.
Just an idea.

or hell i could just be smart about it and buy a complete JDM SR20DET swap and install it for $1,700

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

The sellers feedback looks ok... If they have been selling turbo's check their actual feedback.
You might check car-parts.com

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75 Luv, 350 V8, TH350, Camaro rearend. New 1975 Luv Step side. Stock for now.
Grandmaster of the "Shade Tree" way.. I can't see the yard for all the cars. Come on down and we will sit on the porch and watch the grass grow.

either one of those or a volvo garrett t3/t4. either would work well
i am debating between a toyota SC14 supercharger from a 4agze, or a t3/t4 turbo or similar.

I love being right next to portland soo mant parts for amazing deals.
still looking for a 5 speed, maybe somehow attatch a manual overdrive maybe behind the t-case?

i really want to ride the National Enduro Circuit in the next year or two.. i rode the Upton wyoming round and did pretty well, rounding up the funds... need the luv to do some LONGG drives for a summer.

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride